• The Korean Journal of Pesticide Science
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• v.12 no.2
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• pp.162-167
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• 2008

To enhance the control efficacy against cockroaches in dwelling space, repellent ("Push") was set down on one comer and a poison bait including attractant ("Pull") was on the opposite side. And we tested the control efficacy of Push-Pull strategy by behavior-stimuli of cockroaches. In a mini-field test, German cockroach males primarily chose shelters nearest to the attractant-treated surfaces and farthest from the repellent-treated surfaces. The consumption of food or bait was also highest from food nearest to the preferred shelters by push-pull effect. We evaluated the push-pull insecticidal efficacies of five essential oils belong to Citrus plant, namely, grapefruit, lemon, lime, orange, and petitgrain. The combined push-pull treatments appeared to be faster and higher insecticidal effects than single (pull) treatment, and the repellent efficacy of Citrus oils was in the order of grapefruit > lemon > lime > orange > petitgrain. Therefore, we propose the effective control of the german cockroach using Citrus oils as repellents and push-pull method into a limited area.

• Korean journal of applied entomology
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• v.44 no.4 s.141
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• pp.265-270
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• 2005

Seasonal occurrence of the stink bug Piezodorus hybneri (Gmelin) (Heteroptera: Penta-tomidae) was monitored at a soybean field and the campus of Gyeongsang National University, Gyeongnam. Korea, in which host plants are less available for the bug with aggregation pheromone traps of Riptortus clavatus Thunberg (Heteroptera: Alydidae) in 2004. At soybean field, P. hybneri began to be attracted to traps from June 28, earlier than flowering stage of soybean plants. Number of P. hybneri attracted increased sharply after October 11. At the campus the bugs were not attracted to traps from March 21 to October 5, but began to be attracted since October 11. Difference in the occurrences in the two sites may suggest that the stink bug immigrates actively into soybean field to find host plant. P. hybneri that had been attracted to traps since October 11 was assumed to be diapausing adults emigrating to hibernation sites. There was no difference between sexes in trap catches. The fact that P. hybneri was attracted from June to late November may suggest that the aggregation pheromone of R. clavatus was attractive to both non-diapausing and diapausing adults of P. hybneri. The aggregation pheromone traps, when baited with 16.7+16.7+16.7 mg or 7+36+7 mg of (E)-2-hexenyl (Z)-3-hexenoate, (E)-2-hexenyl (E)-2-hexenoate, and myristyl isobutyrate, attracted significantly higher number of both sexes of P. hybneri adults than the live male traps baited with ten R. clavatus males and hexane control.

• The Korean Journal of Pesticide Science
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• v.12 no.4
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• pp.391-396
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• 2008

The pine sawyer, Monochamus saltuarius Gebler (Colepotera: Cerambycidae) was newly known as a vector of pinewood nematode causing the pine wilt disease in Korean white pine (P. koraiensis Siebold & Zucc.) forestry. Recently, it has a serious problem to spread fast and widely throughout Korea by transferring M. saltuarius. For the control of M. saltuarius, this study was investigated the attractants by analyzing from the Korean white pine. Major components of Korean white pine was analyzed as $\alpha$-pinene and ethanol, and reported as an attractant against Monochamus genus. Ipsenol and ipsdienol, the pheromones of Ips genus known as attractant components of woodboring beetles, were tested to the attractive efficacy against Monochamus saltuarius. The attractive efficacy showed 67.9% of Ipsenol plus ipsdienol and ipsenol, ipsdienol mixed with $\alpha$-pinene plus ethanol was showed 67.7% and 79.3%, respectively. Especially, ipsdienol with $\alpha$-pinene and ethanol was shown the high synergy effect, and the attractant effect was higher at M. saltuarius female than male.

• 보일러설비
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• s.66
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• pp.102-104
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• 1999

• Korean journal of applied entomology
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• v.31 no.1
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• pp.45-49
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• 1992

Studies were conducted to control Spodoptera exigua in Allium fistulosum field using synthetic sex pheromone trap. Heavily, medium and lightly damagd fields at early transplanting time showed no differences in control effects after 8 weeks of establishment of pheromone traps in Allium fistulosum fields. Number of damaged leaves in each treated field was 0.2-3 individuals per 60 hills comparing with 33.2 individuals at non-treated field. Also, the numbers uf male adults attracted to pheromone traps were 1.8-5.0 individuals at the big inning of installation but increased to 25.8, 49.9, 74.9, and 77.4 individuals after 2, 4, 6, and 8 weeks, respectively. There was a negative correlation between amount of male adults attracted to pheromone traps and number of damaged leaves (r=-0.9572*). Number of adults attracted to various colored light trap for 30 days were 6 in red, 11 in white and none in blue comparing with 1,041 individuals in pheromone trap.

• Korean journal of applied entomology
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• v.57 no.2
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• pp.69-75
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• 2018

Bactrocera depressa and B. scutellata are serious insect pests to pumpkin in Korea. Adult stage which exposes to aerial condition is the optimal target for control because the immature stages of both species hide within host fruit, flowers or under ground. This study aimed to develop an attract-to-kill technique of their females. A commercially available attract-to-kill agent was not effective to attract these two pumpkin fruit flies. This study developed an attractant containing protein-based terpinyl acetate (TA). This TA-protein lure was effective to attract two pumpkin fruit flies. It attracted both sexes with female-biased frequency (60-70%). This TA-protein lure would be used for control both pumpkin fruit flies and may be used for monitoring field populations of B. depressa, in which specific attractant is not known.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.05a
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• pp.160-161
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• 2018

ITU-R Study Group Working Party 5B에서는 해상에서 자율운항선을 안전하게 운항하기 위해 자율운항선을 통한 제어센터-VTS, 제어센터-유인선 간의 정보교환이 이루어 질 수 있도록 Vessel traffic control voice relay의 기능을 제시하였다. 이에 자율운항선을 통해 제어센터-VTS, 제어센터-유인선 간의 원활한 정보교환이 가능하도록 사용자 기능 요구사항, 사용자 비기능 요구사항, 인터페이스 요구사항으로 분석함으로써 통신중계시스템 설계 및 각 운용 기기별 정보교환 체계를 구축하였다. 하지만 자율운항선-타 선박간의 충돌 위험성을 감지할 경우 충돌회피를 위한 흐름 및 통신중계시템을 활용한 메시지 처리과정은 설계되지 아니한 실정이다. 이에 본 연구에서는 액티비티, 제어흐름, 작업 흐름 등의 표현이 가능한 UML(unified modeling language)을 활용함으로써 항해단계 중 발생할 수 있는 상황별 시나리오를 제어 흐름 형태로 표현한 정보교환 메시지 처리 알고리즘을 제안하고자 한다.

• Research in Plant Disease
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• v.16 no.1
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• pp.106-108
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• 2010

This survey was conducted to investigate effect of covering with polyvinyl ($120{\times}90cm$) on incidence of Phytophthora blight and anthracnose and growth. Early growth of pepper plant was superior when was covered with polyvinyl after planting. Incidence of anthracnose and Phytophthora blight was lower 26.9% and 60.3% in covering system than those in conventional culture system, respectively. A yield of dried red pepper was more 48.5% in cultured with covering system than that in conventional culture system.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.2
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• pp.507-512
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• 2017

For manned planetary exploration, human beings are developing technologies that can permanently reside on the planet, and the basic three elements of residence, such as clothing and shelter, are required to support essential technologies in construction. In order to develop infrastructure construction technology internationally, various materials and methods such as local cementation, sulfur and aluminum have been tried. in this study, a purpose is proposed a polymer concrete construction validation technology that appropriates the conditions required for manmade exploration in order to develop construction infrastructure material technology using polymer. Concrete specimens with a 10% weight ratio polymer prepared by heating on the bottom were stabilized after 2 hours of heating, and the strength was lower than the top heating method, but the solidifying speed was 2 times faster. These results are expected to be applicable not only to construction of lunar facilities for manned exploration but also to improve the construction of infrastructures such as roads and levees to prevent dust.

• The Korean Journal of Pesticide Science
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• v.17 no.3
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• pp.200-205
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• 2013

Mating disruption experiments were evaluated and compared in several pheromone traps and sex pheromone composition ratios at commercial chestnut garden for developing alternative control method of D. punctiferalis. The highest attractive was shown in Delta traps at the effective sex pheromone ratio of 75:25 (E10-16:A1:Z10-16:A1). Comparisons of domestic and imported pheromone constituents were not significant difference in 90:10 (E10-16:A1:Z10-16:A1). But, there was significant difference in sex pheromone ratio of 75:25. D. punctiferalis was caught the highest number in Gongju area for attractive test using pheromone trap. Attractive effects with dose of pheromone were showed the highest at 2.5 mg/lure and 1 mg/lure in Gongju area and Cheongyang area respectively. However, there was no significant difference among pheromone dose in Buyeo area. These data could be useful for eco-friendly managing of D. punctiferalis in the chestnut farm.